我在尝试实现用户上传图片和用作头像的方式时遇到了使用php sha1_file的问题。只有当给定文件高于5mb时，才会出现问题
警告消息：＆＃34;：sha1_file（）：文件名不能为空＆＃34; 。
只有当文件高于5mb并且如果我尝试上传smaler文件时，一切都很好。
我的PHP代码：
<?php
require_once 'connect.php';
if (!isset($_SESSION['user'])) {
header('Location: login.php');
exit;
}
$username = $_SESSION['user'];
$sql = "SELECT
username,
first_name,
age,
picture
FROM
users
WHERE
username = ?
";
$stmt = $pdo->prepare($sql);
$stmt->execute([$username]);
$user = $stmt->fetch();
$error = "";
if (isset($_POST['submit'])) {
$query = "UPDATE users
SET picture=:picture
WHERE username = '$username'";
$stmt = $pdo->prepare($query);
$picture = !empty($_FILES["picture"]["name"])
? sha1_file($_FILES["picture"]["tmp_name"]) . "-" . basename($_FILES["picture"]["name"])
: "";
$picture = htmlspecialchars(strip_tags($picture));
$stmt->bindParam(':picture', $picture);
try {
if ($picture) {
// sha1_file() function is used to make a unique file name
$target_directory = "uploads/";
$target_file = $target_directory . $picture;
$file_type = pathinfo($target_file, PATHINFO_EXTENSION);
// error message is empty
//$file_upload_error_messages = "";
$check = getimagesize($_FILES["picture"]["tmp_name"]);
if ($check !== false) {
} else {
throw new Exception("Submitted file is not an image.");
//$file_upload_error_messages .= "<div>Submitted file is not an image.</div>";
}
if ($_FILES['picture']['size'] == 0) {
throw new Exception("Please submit a file.");
//$file_upload_error_messages .= "<div>Please submit a file.</div>";
}
$allowed_file_types = array("jpg", "jpeg", "png");
if (!in_array($file_type, $allowed_file_types)) {
throw new Exception("Only JPG, JPEG, PNG files are allowed.");
//$file_upload_error_messages .= "<div>Only JPG, JPEG, PNG files are allowed.</div>";
}
if (file_exists($target_file)) {
throw new Exception("Image already exists. Try to change file name.");
//$file_upload_error_messages .= "<div>Image already exists. Try to change file name.</div>";
}
if ($_FILES['picture']['size'] > (2048000)) {
throw new Exception("Image must be less than 2 MB in size.");
//$file_upload_error_messages .= "<div>Image must be less than 2 MB in size.</div>";
}
if (!is_dir($target_directory)) {
mkdir($target_directory, 0777, true);
}
if (empty($file_upload_error_messages)) {
if (move_uploaded_file($_FILES["picture"]["tmp_name"], $target_file)) {
$stmt->execute();
header("Location: profile.php");
} else {
echo "<div class='alert alert-danger'>";
echo "<div>Unable to upload photo.</div>";
echo "<div>Update the record to upload photo.</div>";
echo "</div>";
}
} // if $file_upload_error_messages is NOT empty
else {
// it means there are some errors, so show them to user
echo "<div class='alert alert-danger'>";
echo "<div>{$file_upload_error_messages}</div>";
echo "<div>Update the record to upload photo.</div>";
echo "</div>";
}
}
else{
throw new Exception("Please select a picture.");
}
//header("Location: profile.php");
}
catch(Exception $exception){
$avatarQuery = "SELECT id, username, picture FROM users WHERE username = '$username'";
$avatarStmt = $pdo->prepare($avatarQuery);
//$stmt->bindParam(1, $id);
$avatarStmt->execute();
// store retrieved row to a variable
$row = $avatarStmt->fetch(PDO::FETCH_ASSOC);
$avatar = htmlspecialchars($row['picture'], ENT_QUOTES);
$error = $exception->getMessage();
}
} else {
$avatarQuery = "SELECT id, username, picture FROM users WHERE username = '$username'";
$avatarStmt = $pdo->prepare($avatarQuery);
//$stmt->bindParam(1, $id);
$avatarStmt->execute();
// store retrieved row to a variable
$row = $avatarStmt->fetch(PDO::FETCH_ASSOC);
$avatar = htmlspecialchars($row['picture'], ENT_QUOTES);
}
?>
<!doctype html>
<html lang="en">
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<link rel="shortcut icon" href="images/logoNew_bubbles.png"/>
<title>User Profile</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"
integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link type="text/css" rel="stylesheet" media="screen"
href="https://netdna.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css">
<link href="css/styles.css" rel="stylesheet">
</head>
<body class="text-center" style="background-color:#eee">
<header class="fixed-top">
<?php include_once "php_includes/header.php"; ?>
</header>
<div class="container" style="margin-top: 100px; margin-bottom: 150px;">
<div class="col-sm-1"></div>
<div class="col-sm-10" style="text-align:center; margin-top: 50px">
<?php if ($error) : ?>
<div class="alert alert-danger">
<strong> <?= $error ?></strong>
</div>
<?php endif; ?>
<?php $error = ''; ?>
<div class="row">
<div id="avatarDiv" class="col-lg-12">
<h3 class="font-weight-bold">Profile</h3>
<p><?php echo $avatar ? "<img src='uploads/{$avatar}' style='max-height: 200px;
overflow: auto;' />" : "<img src='images/avatar.jpg' style='width:300px; height:25%;';>" ?></p>
</div>
</div>
<div>
<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post"
enctype="multipart/form-data">
<div class="row justify-content-md-center mb-1">
<div class="col-md-3"></div>
<div class=" col-md-auto">
<input class="form-control-file" type="file" name="picture" id="image">
</div>
<div class="col-md-1"></div>
</div>
<input class="btn btn-success mb-1" type="submit" value="Upload Image" name="submit">
</form>
<form>
<div class="border rounded my-5 pt-4 pb-3" style="width: 100%">
<div class="row justify-content-md-center ">
<p class="col-lg-6 text-center px-2"> User name: <?= $user['username'] ?></p>
</div>
<div class="row justify-content-md-center">
<p class="col-lg-6 text-center px-2"> First name: <?= $user['first_name'] ?> </p>
</div>
<div class="row justify-content-md-center">
<p class="col-lg-6 text-center px-2"> Age: <?= $user['age'] ?></p>
</div>
</div>
</form>
<form class="well well-lg shadow_strokes_big">
<div class="form-group">
<label> Info about me </label>
<textarea id="infoAboutMe" name="infoAboutMe" class="form-control shadow_strokes" rows="3" maxlength="200" style="resize: none; "></textarea>
</div>
<div>
<h3 class="welcome mt-5 font-weight-bold">My Favorite Beers</h3>
</div>
<div class="row justify-content-md-center my-3 py-3">
<div class="polaroid rounded col-sm-3 mx-5 shadow_strokes" >
<div class="col-md py-4">
<img src="images/qh_beer.png">
<p>Beer 1</p>
</div>
</div>
<div class="polaroid rounded col-sm-3 mx-5 shadow_strokes" >
<div class=" col-md py-4">
<img src="images/qh_beer.png">
<p>Beer 2</p>
</div>
</div>
<div class=" polaroid rounded col-sm-3 mx-5 shadow_strokes" >
<div class="col-md py-4">
<img src="images/qh_beer.png">
<p>Beer 3</p>
</div>
</div>
</div>
<div>
<div>
<button class="btn btn-warning" type="submit" name="saveChanges">Save Changes</button>
</div>
</div>
</form>
<div class="justify-content-md-center row my-3">
<a href="#" class="btn btn-warning mx-3 col-lg-2">Change info</a>
<a href="#" class="btn btn-warning mx-3 col-lg-2">My orders</a>
</div>
<div class="justify-content-md-center row my-3">
<a href="#" class="btn btn-warning mx-3 col-lg-2">My wallet</a>
<a href="#" class="btn btn-warning mx-3 col-lg-2">Basket</a>
</div>
</div>
<div class="col-sm-1"></div>
</div>
<footer class="container fixed-bottom">
<?php include_once "php_includes/footer.php"; ?>
</footer>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function () {
$("#profile").addClass('text_shadow');
});
</script>
</body>
</html>
目前，如果我尝试上传5mb以上的文件，则会显示
sha1_file警告消息而不是我的自定义验证消息＆＃34;图像大小必须小于2 MB＆＃34;。
答案 0 :(得分：0)
基于错误： -
＆＃34;图片大小必须小于2 MB＆＃34;。
你需要增加一些东西： -
upload_max_filesize
post_max_size
从2M到5M或 10M 文件中的php.ini。
增加它们，保存它们并 然后重新启动服务器 ，然后重试。